HAMEG 103-2 Problem

[ghostbox]

Hey guys,

I'm fairly new to electronics, so I bought used Hameg 103-2 as my first oscilloscope, and this is what happens when I change Volts/Division (video).

Also, when I set to 20V it smells weird, not like burning, but something similar. 



Does anyone have any idea what could be the problem?

Any help would be much appreciated.

Thanks in advance!

[eeadata]

it seems there is an dirty switch contact. Take it apart and clean contacts. Lube shafts .

BTW service it.

[tautech]

it seems there is an dirty switch contact. Take it apart and clean contacts. Lube shafts .

BTW service it.

+1
Products like Deoxit are normally used to clean the gold contacts in the V/Div selector.
Sometimes just "exercise" of the selectors will clean up the contacts.

Service manual
http://elektrotanya.com/hameg_hm103_oscilloscope_um.pdf/download.html
Wait until the "Get Manual" link appears, then click to download.